[AMRadio] antennas

Rob Atkinson ranchorobbo at gmail.com
Sun Oct 18 10:57:46 EDT 2009


I had wondered why no one had mentioned a simple tube of silicone from
the hardware store and was about to but you took the words out of my
mouth.  I was starting to think there was some gotcha associated with
it that I didn't know about, but I've been using it outside with no
problems.  Maybe it breaks down in sunlight?



On Sun, Oct 18, 2009 at 7:26 AM, Edward Swynar <gswynar at durham.net> wrote:
> Hi Guys,
> Contrary to "...tribal knowledge", I insist that clear silicone
> sealant---G.E. brand, whatever---still can't be beat on applications that
> are out-of-doors & in the open...!
> I smear it all over my PL-259 connectors---and then some---that I use to
> hook-up my feeders to the bases / tuning networks of my extended inverted
> "L" arrays for 160-meters here: in the open air, there are no noxious /
> corrosive fumes to contend with...
> In the Spring, when it's time to roll-up the radials & store away the tuning
> networks, I simply get an X-acto knife & make a slit into the silicone the
> length of the connector, then peel the whole thing off in one piece.
> It's cheap, effective, and never allows water entry into the "works"---even
> when buried for (literally) months at a time under a foot & more of snow!
> I concur, however, with the "dangerous" potential side-effects of
> silicone...case in point: one Field Day, many moons ago, I used silicone as
> an adhesive to anchor a small air-variable capacitor down securely  inside a
> Tupperware enclosure, used to tune a delta loop on 40. It was a dewey damp
> Sunday morning when we opened-up the Tupperware lid to se why the tuning of
> our antenna had gone awry...to our surprise, the rotor blades of the
> capacitor were completely coated in rust!
> Our only conclusion was that the noxious, vinegar-like smell of the
> silicone, in a sealed environment, had somehow "attacked" the steel
> capacitor, & aged it by a quantum leap!
> Used outdoors & in the open, however, I've never had that problem...
> ~73~ de Eddy VE3CUI - VE3XZ

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